rev-list and "ambiguous" IDs

When using a command like `git rev-list dc41e --`, it's possible to get output like this: (from newer Git versions) error: short SHA1 dc41e is ambiguous hint: The candidates are: hint: dc41eeb01ba commit 2012-11-23 - Stuff from the commit message hint: dc41e0d508b tree hint: dc41e5bef41 tree hint: dc41e11ee18 blob fatal: bad revision 'dc41e'

Is there any way to ask rev-list to be a little...pickier about what it considers a candidate? Almost without question the two trees and the blob aren't what I'm asking for, which means there's actually only one real candidate.

Also, while considering this, I noticed that `git rev-list dc41e11ee18` (the blob from the output above) doesn't fail. It silently exits, nothing written to stdout or stderr, with 0 status. A little surprising; I would have expected rev-list to complain that dc41e11ee18 isn't a valid commit-ish value.

Bryan